Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Natural Park “Alluvial plain of the Dyje River” (southern part): Quaternary geology and development of the alluvial plain
AbstractThe investigated part of the River Dyje floodplain belongs geologically to the intermontane depression of the Vienna Basin in which the Miocene and Quaternary sediments occur. The basal gravel at the valley floor is the oldest Quaternary sediment in the area and is dated to 16,170 ± 480 B.P. (Hv-9728, Poštorná). The redeposition of the gravel continued untill the Lower and Middle Holocene respectively as evidenced by sample Hv-9729, Poštorná - Charvátská Nová Ves dated to 7,990 ± 95 B. P. The gravel is overlain by Lateglacial to Early Holocene sand dunes called locally "hrúdy". In the dune sand a buried soil of the pseudochernozem type is developed in places ("Barvínkův hrúd" - Břeclav, Pohansko), evidencing short break in the sand deposition. The youngest are the overbank flood loams overlying the gravel and partly even sand dunes. Frequent oxbow lakes and abandoned channels bearning organic clay, loam and bog earth are typical of this region.